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CONTROL FEATURES
The Y-Series sequence panel includes:
• Standard Indicator Lights:
Stages 1 to 8: Red, indicates which stages are turned on.
Pump: Green, indicates that the pump circuit is energized.
Call for Heat: Green, indicates that a call for heat signal is present.
Control On: Green, indicates outdoor temperature is below the Outdoor Cutoff Temperature
potentiometer setting and that the boiler will respond to a call for heat.
Setting Error: Red, indicates one or more of the on-board settings is incorrect.
Sensor Error: Red, indicates that the Water or Outdoor Temperature Sensor has an out-of-range reading.
• Adjustment Knobs:
Reset Ratio: 0.12:1 to 8:1; determines how much the micro-controller calculated Target
Temperature will change for a given outdoor temperature change.
Control Band: 1°F to 10°F; the temperature above or below the Target Temperature at which the boiler
turns off and on.
Pump Off Delay: 0 to 10 min.; determines when the pump shuts off after entering Outdoor Cutoff mode.
. Outdoor Cutoff 32°F to 200°F; a warm weather shutdown feature. When the outdoor temperature
Temperature: exceeds this setting, the boiler will not fire unless placed in manual override mode.
Outdoor Cutoff 1°F to 10°F; the number of degrees below the Outdoor Cutoff (O/C)
Deadband: Temperature which causes the O/C to reset.
Boiler On Delay: 0 to 5 min.; sets the time interval between sequential boiler start ups.
Stage On Delay: 0 to 60 sec.; determines the time delay between stages turning on.
Max. Water Temp.: 70°F to 235°F; the maximum value that the Target Temperature is allowed to reach.
Set Point: 40°F to 220°F; the system output temperature desired when the outdoor temperature is
70°F or, in domestic water applications, the desired water temperature.
• Logic Test Button, Jumper and Switches:
System Test Button (S1): initiates micro self test which causes the status indicator lights to blink 5 times
indicating the micro-controller is functioning properly.
Last Stage Jumper (J2): selects the last active stage used for boiler control.
First Stage #1 Selector (S2): designates the first stage of each boiler in a multi-boiler system. Switch
position #1 should always be on.
Mode Selector (S3): switch #1 selects either Manual or Auto Lead-Lag Mode. Switch #2 provides an
Outdoor Reset defeat. Switch #3 configures the Y–Series for Master/Slave ganged
operation. Switch #4 allows the Set Point to be set below 105°F.
Bypass Switches (S5): allows user to turn on any stage(s) regardless of current settings and
conditions if, and only if, the pump relay is already activated.
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